acknowledgment

mastery
UK /əkˈnɒl.ɪd͡ʒ.mənt/ US /əkˈnɑ.lɪd͡ʒ.mənt/noun

card 1 of 10 · context meaning

Which meaning of 'acknowledgment' best matches the usage in the sentence?

He gave a nod of acknowledgment when he saw his colleague.